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From ZnO colloidal nanostructures to functional nanomaterials
| Content Provider | Semantic Scholar |
|---|---|
| Author | Grasset, Fabien |
| Copyright Year | 2007 |
| Abstract | Thin films are material layers ranging from fractions of a nanometer to several micrometers in thickness. They can be deposited onto metal, ceramic, glass, or semiconductor bases. Among the numerous coating techniques available, chemical or physical vapor deposition and sol-gel methods are the most commonly used in industry. Thin films are mainly used for optical coating and electronic device applications. However, the preparation of low cost functional thin films with high transparency and modulated optical properties remains a challenge for laser, photocatalytic, or display panel applications. For example, for photocatalysis—which is increasingly used in chemical waste degradation—photostable light-harvesting nanoarchitectures are required: these are nanostructures that can be used to absorb light to facilitate chemical reactions, but are nevertheless robust to the radiation. Were they available, and provided that appropriate semiconductor catalysts were selected, charge carriers could be generated by UV or visible radiation to initiate reduction and oxidation reactions with adsorbed reactants, leading to the destruction of pollutants. However, most photocatalysts consist of metal oxides that are only functional in the UV region. The result is a lack of suitable materials with the appropriate band gap for visible absorption and the required stability for practical applications. A second example is provided by Y2O3:Eu3+ , the most widely used red phosphor for field emission display applications. Much attention has been paid to the synthesis and luminescent properties of Eu3+-doped rare-earth orthoborates (REBO3) thin films. This is due to their desirable properties as ideal vacuum UV phosphors, key materials for the development of plasma display panels. For such phosphors, both luminescence efficiency and color purity are required. Unfortunately, as a red phosphor, Figure 1. Camera images of ZnO materials in various shapes. |
| File Format | PDF HTM / HTML |
| DOI | 10.1117/2.1200708.0805 |
| Alternate Webpage(s) | http://www.spie.org/documents/Newsroom/Imported/0805/0805-2007-08-14.pdf |
| Alternate Webpage(s) | https://doi.org/10.1117/2.1200708.0805 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
